George d



No Model.)

G. D. 'PEAREY.

SANDPAPBRING MACHINE.

Patented Aug. 7; 1883.

Invenior G50; 0. FEAREY,

N. iETERa. Prwlomlm npm. Washington, 04 c,

UNITED STATES PATE T Grrron.

GEORGE n. FEAItEY, or ALBANY, NEW YORK.

SANDPAPERlNG-MACHINE.

SPECIFICATION forming part of Letters Patent No. 282,509, dated August '7, 1883. Application filed June 5,1882. (No model.)

Be it known that I, GEORGE D. FEAREY, of the city and county of Albany, and State To all whom it may concern/.- a

of New York, have invented certain new and. useful Improvements .in Sandpapermg-Machines, of which the following is a full and exact description.

. said heads being fixed and the other movable longitudinally on said shaft, with an expansi ble cylinder provided with a longitudinal scarf- 5 joint, and fitted on said heads, and a sand-paper sleeve and interposed cylindrical packing.

It ,also consists in coniform heads, each provided with annular flanges, one of said heads being fixed and the other movable, in combination with a shaft on which they are mounted, an expansible cylinder, and a sandpaper sleeve and interposed packing.

The object of my improvement is to provide a cylindrical body for sustaining an intact sleeve of sandpaper that will not yield toexternal pressure, nor be affected by the heat generated by the operation of sandpaper ing; and a further object of my improvement is to dispense with the clamping-jaws, tacks, and other usual modes of securing sandpaper to acylinder. These objects I attain by means of the mechanism illustrated in the accom- 4 ble means.

, or spindle for carryingthe cylinder, to which a rotatory motion may be imparted by any suitalargement or collar, a, and at its outer end with a screwed portion for receiving a nut, a,- B, coniform heads fitted to the shaft A, and provided with flanges b at their largest ends; 0, expansible cylinder, made of metal, wood, or other suit able material possessing sufficient strength,

Said shaft is providedwith an enthe overlapping or scarf form for the purpose of preserving an even unbroken convex surface to the cylinder, and, when required, the outer surface of the cylinder may be roughened for the purpose of producing sufficient adhesion for the elastic cushion that is fixed thereon D, a cylindrical sleeve of sandpaper, and E a cylindrical sleeve of felt, or other material suitable for forming an elastic cushion between the cylinder 0 and the sandpaper sleeve D. One of the heads B is fixed on the shaft A against the collar a, as shown in Figs. 1 and 2. The sand-paper sleeve D is slipped over the felt sleeve E, and then both are passed over the expansible cylinder, which is compressed diametrically for that purpose, until the sand-paper sleeve is centrally loeated on said cylinder; The cylinder 0, if it has been removed from its place, is next replaced, and the second head B and nut a are fixed on the spindle A. Then, by screwing down the nut a the coniforni heads B will, by an internally-applied pressure. cause the cylinder 0 to expand in diameter inside of the sleeves D and E until said sleeves are held so firmly that they will rotate with the spindle A and withstandany ordinary resistance that such machines are subjected to.

I am aware that india-rubber cylinders adapted to expand when compressed endwise have heretofore been used 'in sandpaperingmachines 5 but such cylinders are open to the objection that the endwise compression causes them to bulge outand lose a true cylindrical form, and those cylinders are also open to the further objection that the heat generated by.

the operation of sandpapering heats the rubher and causes it to glaze the work operated on, so that it is executed very imperfectly.

I claim as my invention- 1. "The combination of shaft A and the coniform heads B, fitted thereon, one of saidheads nally on said shaft, in combination with an expansible cylinder, 0, provided with a longitudinal scarf-joint, c, and fitted on said heads, and a sand-paper sleeve, D, and interposed being .fixed and the other'movable longitudt,

IOO

cylindrical packing E, substantially as set sleeve D, and packing E, substantially as set forth. I forth.

2. The coniform heads B each provided with annular flanges b, one 0% said heads be- GEORGE FEAREY' 5 ing fixed and the other movable, in combina- Witnesses:

tion with a shaft, A, on which they are mount- WILLIAM H. LOW, ed, an expansible cylinder, 0, sandpaper" J. T. XVILLSON. 

